An Act to facilitate vehicular traffic across the Commonwealth by providing for the construction, operation and maintenance of turnpike extensions and improvements; conferring powers and imposing duties on the Pennsylvania Turnpike Commission; authorizing the issuance of turnpike revenue bonds, notes or other obligations of the Commonwealth, payable solely from revenues of the commission, including tolls, or from such funds as may be available to the commission for that purpose, to pay the cost of such turnpikes; * * * granting certain powers and authority to municipalities and agencies of the Commonwealth to cooperate with the commission; and authorizing the issuance of turnpike revenue refunding bonds.